CN211335761U - Manual control structure of automobile anti-glare rearview mirror - Google Patents
Manual control structure of automobile anti-glare rearview mirror Download PDFInfo
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- CN211335761U CN211335761U CN201921986768.5U CN201921986768U CN211335761U CN 211335761 U CN211335761 U CN 211335761U CN 201921986768 U CN201921986768 U CN 201921986768U CN 211335761 U CN211335761 U CN 211335761U
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- 230000008859 change Effects 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 3
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- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 3
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The utility model provides a manual control structure of car anti-dazzle rear-view mirror, including installing the switching button in the auttombilism cabin, the power and can be by the direct automobile anti-dazzle rear-view mirror's of power supply of 12V color change component, the switching button is connected with color change component and power and is connected for the second branch road, the switching button is used for making one branch road switch on another branch road disconnection in first branch road and the second branch road, the on-off condition of two branch roads of switching button changes once every time presses, when the second branch road switch-on, first branch road disconnection, color change component circular telegram discolours, when first branch road switch-on, the second branch road disconnection, color change component discharges and fades to first branch road. The utility model has the advantages that: the color-changing element can be directly connected on the corresponding control circuit, so that the use of a voltage conversion module is avoided, the manufacture and the use are more convenient, a voltage reduction chip and a program control chip are not needed, and the production cost is reduced.
Description
Technical Field
The utility model relates to a car anti-dazzle mirror preparation technical field especially indicates a manual control structure of car anti-dazzle mesh rear-view mirror.
Background
The existing chinese patent application with the application number CN201910522480.0 entitled "an electrochromic control circuit and control method, rearview mirror" discloses an electrochromic control circuit and control method, and a rearview mirror, wherein the electrochromic control circuit includes: the device comprises a first voltage conversion module, a second voltage conversion module and a voltage selection module; the first voltage conversion module is respectively electrically connected with the power supply voltage output end and the voltage selection module and is used for outputting a first voltage to the voltage selection module; the second voltage conversion module is respectively electrically connected with the power supply voltage output end and the voltage selection module and is used for outputting a second voltage to the voltage selection module; the voltage selection module is electrically connected with the control voltage output end and used for selecting the first voltage or the second voltage under the control of the control voltage and outputting the first voltage or the second voltage to the electrochromic device. The invention provides an electrochromic control circuit, an electrochromic control method and a rearview mirror, and aims to solve the problem that a driving circuit of an existing electrochromic device is poor in compatibility with the electrochromic device. However, the voltage conversion module is required to be used in the rear-view mirror, and the voltage reduction chip and the program control chip are relatively expensive to manufacture, so that the structure of the rear-view mirror needs to be further improved.
Disclosure of Invention
The utility model aims to solve the technical problem that to above-mentioned prior art current situation and provide a simple structure, avoided the use of voltage conversion module, the cost of manufacture is low, and the rear-view mirror discolours moreover and adjusts convenient automobile anti-dazzle mesh rear-view mirror's manual control structure.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: this manual control structure of car anti-dazzle mesh rear-view mirror, its characterized in that: including the change button that can install in the auttombilism cabin, the power and can be by the color-changing component of the anti-dazzle mesh rear-view mirror of car of 12V's power direct power supply, the change button is connected for first branch road with color-changing component, the change button is connected for the second branch road with color-changing component and power, the change button is used for making another branch road of a branch road switch-on in first branch road and the second branch road disconnection, and the on-off condition of two branch roads of the change button changes once every time of pressing, and when the second branch road switch-on, first branch road disconnection, color-changing component circular telegram discolours, and when first branch road switch-on, the second branch road disconnection, color-changing component discharges and fades to first branch.
As a refinement, the switching button may preferably be mounted on the steering wheel of the automobile.
As a refinement, the switching button may preferably be mounted on a vehicle console.
As a refinement, the power supply may preferably be a 12V vehicle-mounted battery.
As an improvement, the switching button may preferably be connected to a switching leg of the switching switch, the switching switch includes a switching leg capable of being switched by the switching button, a switching end movably connected to one end of the switching leg and two electrical terminals that are not connected to each other and are capable of being connected to the other end of the switching leg, a first electrical terminal is connected in series to the power supply, the color changing element and the switching end, and a second electrical terminal is connected in series to the color changing element and the switching end, when the switching button controls the switching leg to connect the switching end and the first electrical terminal, the second branch is connected, and when the switching button controls the switching leg to connect the switching end and the second electrical terminal, the first branch is connected.
In a further improvement, the second power connection end can be preferably a normally closed port, and the initial state of the change-over switch is that the change-over end is communicated with the second power connection end through a change-over bridge arm.
As an improvement, the specific structure of the color-changing element may be preferably, the color-changing element includes a first glass sheet, a first conductive film layer, a conductive liquid layer, a second conductive film layer and a second glass sheet which are sequentially stacked, the conductive liquid in the conductive liquid layer is electrochromic liquid, the upper, lower, left and right four sides of the electrochromic liquid are sealed by sealant, the top surface of the electrochromic liquid is in sealed fit with the first conductive film layer, the bottom surface of the electrochromic liquid is in sealed fit with the second conductive film layer, a conductive part for connecting the first conductive film layer with a power supply is arranged on the side wall of the first glass sheet, a second conductive part for connecting the second conductive film layer with the power supply is arranged on the side wall of the second glass sheet, the conductive part, the first conductive film layer, the conductive liquid layer, the second conductive film layer, the second conductive part, the switch and the power supply form a power-on branch, and the first conductive film layer, The sum of the resistances of the second conductive film layer and the conductive liquid layer is 100-180 ohms.
In a further improvement, the first glass sheet may preferably be arranged to be vertically staggered with respect to the second glass sheet, the conductive part is an upper electrode strip sandwiched between the top edges of the first glass sheet, and the second conductive part is a lower electrode strip sandwiched between the bottom edges of the second glass sheet.
In a further improvement, the first conductive film layer can be preferably made of ITO; the second conductive film layer can preferably consist of an ITO film layer, a refraction layer and a reflection absorption layer which are sequentially overlapped; the refraction layer comprises N combined refraction layers which are sequentially overlapped, each combined refraction layer comprises a low refraction layer and a high refraction layer which are sequentially overlapped, the reflectivity of the overlapped N combined refraction layers is 60-80%, and N is a natural number larger than 1; the high refractive layer is made of Nb2O5、TiO2、Si3N4Is made of one or more of SiO, the low refraction layer2The thickness of the high refraction layer and the thickness of the low refraction layer are respectively
In a further improvement, the reflection absorption layer can be preferably made of one or more of metal chromium, chromium-nickel alloy, silicon-aluminum alloy and indium-tin alloy, and the thickness of the reflection absorption layer is
Compared with the prior art, the utility model has the advantages of: the color-changing element can be directly connected with the corresponding control circuit, thereby avoiding the use of a voltage conversion module, saving a step-down link, simplifying the structure, being more convenient to manufacture and use, and simultaneously avoiding the need of a step-down chip and a program control chip, thereby greatly reducing the production cost; because the sum of the three resistances of the first conductive film layer, the second conductive film layer and the conductive liquid layer used by the color-changing element is 100-180 ohms, the structural conductivity of the color-changing element is higher than that of a corresponding structure in the prior art, 12V voltage can be directly used for supplying power to the color-changing element, and the vehicle-mounted storage battery is usually 12V, so that the vehicle-mounted storage battery can be directly used for supplying power to the color-changing element, and the application is very convenient.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention applied in an automobile;
FIG. 2 is a schematic structural diagram of the color changing element shown in FIG. 1;
fig. 3 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 3, the manual control structure of the anti-glare rearview mirror for the automobile of the present embodiment includes a switch button 34 capable of being installed in a cabin of the automobile, a power source 4, and a color-changing element 1 of the anti-glare rearview mirror for the automobile capable of being directly powered by the 12V power source 4, wherein the switch button 34 is connected to the color-changing element 1 to form a first branch, the switch button 34 is connected to the color-changing element 1 and the power source 4 to form a second branch, the switch button 34 is configured to switch one of the first branch and the second branch on and off, the on-off conditions of the two branches change once when the switch button is pressed, when the second branch is switched on, the first branch is switched off, the color-changing element 1 is powered on to change the color, when the first branch is switched on, the second branch is switched off, and the color-changing element 1 discharges electricity to. The switch button 34 is mounted on the steering wheel 35 of the automobile. Alternatively, the switch button 34 is mounted on the vehicle console. The power source 4 is a 12V vehicle-mounted battery 41. The automobile cab is an automobile inner cavity corresponding to the automobile driver seat, and the switching button 34 is preferably arranged at a position close to the position where the driver hands are placed because the driver needs to keep mental concentration during the driving process of the automobile, so that the switching button 34 is most ideal when arranged on the steering wheel 35 or arranged on an automobile console.
The switching button 34 is connected to the switching arm 3 of the switch, and the specific structure of the switching button 34 connected to the switching arm 3 of the switch are well known in the art and will not be described in detail. The switch comprises a switching arm 3 which can be switched by a switching button 34, a switching end 33 which is movably connected with one end of the switching arm 3, and two electric connection ends which are not communicated with each other and can be connected with the other end of the switching arm 3, wherein a first electric connection end 31 is connected with a power supply 4, a color-changing element 1 and the switching end 33 in series, a second electric connection end 32 is connected with the color-changing element 1 and the switching end 33 in series, when the switching button 34 controls the switching arm 3 to connect the switching end 33 with the first electric connection end 31, the second branch is connected, and when the switching button 34 controls the switching arm 3 to connect the switching end 33 with the second electric connection end 32, the first branch is connected. The second electric connection end 32 is a normally closed port, and the initial state of the switch is that the switching end 33 is communicated with the second electric connection end 32 through the switching bridge arm 3.
The color-changing element 1 has a specific structure that the color-changing element 1 comprises a first glass sheet 11, a first conductive film layer 12, a conductive liquid layer 13, a second conductive film layer and a second glass sheet 19 which are sequentially overlapped, the conductive liquid in the conductive liquid layer 13 is electrochromic liquid, and specific components of the electrochromic liquid belong to the prior art, so detailed description is omitted. EC glass is used for the first glass sheet 11 and the second glass sheet 19. The four sides of the electrochromic liquid are sealed by the sealant 14, the top surface of the electrochromic liquid is in sealing fit with the first conductive film layer 12, the bottom surface of the electrochromic liquid is in sealing fit with the second conductive film layer, a conductive part for connecting the first conductive film layer 12 with the power source 4 is arranged on the side wall of the first glass sheet 11, a second conductive part for connecting the second conductive film layer with the power source 4 is arranged on the side wall of the second glass sheet 19, the conductive part, the first conductive film layer 12, the conductive liquid layer 13, the second conductive film layer, the second conductive part, the change-over switch and the power source 4 form an electrifying branch, and the sum of the three resistances of the first conductive film layer 12, the second conductive film layer and the conductive liquid layer 13 is 100-180 ohms. The first glass plate 11 and the second glass plate 19 are arranged in a vertically staggered manner, the conductive part is an upper electrode strip 21 sandwiched between the top edges of the first glass plate 11, and the second conductive part is a lower electrode strip 22 sandwiched between the bottom edges of the second glass plate 19. A first conductive film layer12 is made of ITO, wherein the ITO refers to indium tin oxide; the second conductive film layer consists of an ITO film layer 15, a refraction layer and a reflection absorption layer 18 which are sequentially overlapped; the refraction layer comprises N combined refraction layers which are sequentially overlapped, each combined refraction layer comprises a low refraction layer 16 and a high refraction layer 17 which are sequentially overlapped, the reflectivity of the overlapped N combined refraction layers is 60-80%, and N is a natural number greater than 1; the high refractive layer 17 is made of Nb2O5、TiO2、Si3N4Is made of one or more of SiO, the low refraction layer 16 is made of SiO2The thickness of the high refraction layer 17 and the thickness of the low refraction layer 16 are respectively
The reflection absorption layer 18 is made of one or more of metal chromium, chromium-nickel alloy, silicon-aluminum alloy and indium-tin alloy, and the thickness of the reflection absorption layer 18 is
The color-changing element 1 is arranged in a bracket 5 of the automobile rearview mirror, and the color-changing element 1 is connected with a power supply 4 and a change-over switch through a circuit.
At present, more and more automatic color-changing anti-glare rearview mirrors are used on vehicles, and an EC device, namely an electrochromic device, which is mainly adopted converts optical signals into electric signals through a photosensitive element and outputs voltage to an execution device (electrochromic glass) through MCU operation. In the prior art, the voltage of the device glass used in the field of rearview mirrors is about 1.2V, and in the actual use process, the vehicle-mounted 12V voltage is generally used for providing power, 12V is converted into 5V (for providing working voltage for the chip) through a voltage reduction link or a power chip, and then the 5V is converted into 1.2V (for providing the actuating device, namely electrochromic glass).
The control structure mainly provides a simplified anti-glare rearview mirror control method, the driving voltage of the control structure is 12V, a vehicle can directly provide a power supply, a voltage reduction link is omitted, a voltage reduction chip and a program control chip are not needed, and the cost is greatly reduced.
The implementation process of the invention comprises the following steps:
1. please see the schematic circuit diagram shown in fig. 3, in which the circuit in fig. 3 is composed of a switch, a 12V vehicle power supply, a color-changing element 1 and a wire;
2. the switch has 3 terminals, respectively, a switch terminal 33, a normally open terminal (i.e., the first electrical terminal 31), and a normally closed terminal (i.e., the second electrical terminal 32), and has two positions, where the normally open terminal and the switch terminal 33 are in a closed state when the normally open terminal and the switch terminal 33 are in an open state, and vice versa, and the normally open and normally closed states can be defined by themselves, where we define the first electrical terminal 31 as a normally open contact and the second electrical terminal 32 as a normally closed contact.
3. In a normal state, the second electrical connection end 32 is connected with the switching end 33, the positive electrode and the negative electrode of the color-changing element 1 are in a short-circuit state, the color-changing element 1 has no voltage, when the first electrical connection end 31 is connected with the switching end 33, the positive electrode and the negative electrode of the color-changing element 1 are in the short-circuit state and are connected with a 12V power supply through a switch, the color-changing element 1 changes color, and an anti-dazzling function is started;
4. after glare, eyes cannot feel dazzling, the switch is pressed, the first electric connection end 31 and the switching end 33 are disconnected, the color-changing element 1 has no voltage, then the second electric connection end 32 and the switching end 33 are connected, the positive electrode and the negative electrode of the color-changing element 1 are in a short circuit state and rapidly discharge, the color-changing element 1 is turned off, and the anti-glare function is turned off;
5. furthermore, the change-over switch can be arranged on the steering wheel, and the anti-dazzling working state can be switched according to the individual requirements.
Compared with the prior art, the manual control structure can be directly driven by a vehicle-mounted power supply, a step-down link is omitted, the circuit control is simpler, and the effect is positive and obvious.
The working principle is as follows: the anti-dazzle control is realized by adopting a color-changing element with the voltage of 12V and a change-over switch and controlling the on and off of a power supply. The switching button 34 is connected with the color changing element 1 to form a first branch, the switching button 34 is connected with the color changing element 1 and the power supply 4 to form a second branch, the switching button 34 is used for enabling one of the first branch and the second branch to be connected and the other branch to be disconnected, the on-off conditions of the two branches of the switching button are changed once when the switching button is pressed once, when the second branch is connected, the first branch is disconnected, the color changing element 1 is electrified to change color, the anti-dazzle effect is achieved, when the first branch is connected, the second branch is disconnected, the color changing element 1 discharges electricity to the first branch and fades, and the automobile anti-dazzle rearview mirror is recovered to a rearview mirror in a high reflection state from a low reflection state.
Claims (10)
1. The utility model provides a manual control structure of car anti-dazzle mesh rear-view mirror which characterized in that: the automobile anti-glare rearview mirror comprises a switching button (34) capable of being installed in an automobile cab, a power source (4) and a color-changing element (1) of the automobile anti-glare rearview mirror capable of being directly powered by the 12V power source (4), wherein the switching button (34) is connected with the color-changing element (1) to form a first branch, the switching button (34) is connected with the color-changing element (1) and the power source (4) to form a second branch, the switching button (34) is used for enabling one of the first branch and the second branch to be connected and the other branch to be disconnected, the on-off conditions of the two branches of the switching button are changed once when the two branches are pressed once, when the second branch is connected, the first branch is disconnected, the color-changing element (1) is electrified to change color, when the first branch is connected, the second branch is disconnected, and the color-changing element (1).
2. The manual control structure of claim 1, wherein: the switching button (34) is mounted on a steering wheel (35) of the vehicle.
3. The manual control structure of claim 1, wherein: the switching button (34) is mounted on the vehicle console.
4. The manual control structure of claim 1, wherein: the power source (4) is a 12V vehicle-mounted battery (41).
5. The manual control structure of any one of claims 1 to 4, wherein: the switching button (34) is connected with a switching bridge arm (3) of a switch, the switch comprises the switching bridge arm (3) which can be switched by the switching button (34), a switching end (33) movably connected with one end of the switching bridge arm (3) and two electric connection ends which are not communicated with each other and can be connected with the other end of the switching bridge arm (3), wherein the first electric connection end (31) is connected with the power supply (4), the color-changing element (1) and the switching end (33) in series, the second electric connection end (32) is connected with the color-changing element (1) and the switching end (33) in series, when the switching button (34) controls the switching bridge arm (3) to switch on the switching end (33) and the first power connection end (31), the second branch is switched on, when the switching button (34) controls the switching bridge arm (3) to connect the switching end (33) and the second connecting end (32), the first branch is connected.
6. The manual control structure of claim 5, wherein: the second power connection end (32) is a normally closed port, and the initial state of the change-over switch is that the change-over end (33) is communicated with the second power connection end (32) through a change-over bridge arm (3).
7. The manual control structure of any one of claims 1 to 4, wherein: the specific structure of the color-changing element (1) is that the color-changing element (1) comprises a first glass sheet (11), a first conductive film layer (12), a conductive liquid layer (13), a second conductive film layer and a second glass sheet (19) which are sequentially overlapped, the conductive liquid in the conductive liquid layer (13) is electrochromic liquid, the upper, lower, left and right four sides of the electrochromic liquid are sealed through a sealant (14), the top surface of the electrochromic liquid is in sealed fit with the first conductive film layer (12), the bottom surface of the electrochromic liquid is in sealed fit with the second conductive film layer, a conductive part for connecting the first conductive film layer (12) with a power supply (4) is arranged on the side wall of the first glass sheet (11), a second conductive part for connecting the second conductive film layer with the power supply (4) is arranged on the side wall of the second glass sheet (19), the conductive part and the first conductive film layer (12), the conductive liquid layer (13), the second conductive film layer, the second conductive part, the change-over switch and the power supply (4) form a power-on branch, and the sum of the resistances of the first conductive film layer (12), the second conductive film layer and the conductive liquid layer (13) is 100-180 ohms.
8. The manual control structure of claim 7, wherein: the first glass sheet (11) and the second glass sheet (19) are arranged in a vertically staggered mode, the conductive parts are upper electric clamping strips (21) clamped on the top edge of the first glass sheet (11), and the second conductive parts are lower electric clamping strips (22) clamped on the bottom edge of the second glass sheet (19).
9. The manual control structure of claim 7, wherein: the first conductive film layer (12) is made of ITO; the second conductive film layer consists of an ITO film layer (15), a refraction layer and a reflection absorption layer (18) which are sequentially overlapped; the refraction layer comprises N combined refraction layers which are sequentially overlapped, each combined refraction layer comprises a low refraction layer (16) and a high refraction layer (17) which are sequentially overlapped, the reflectivity of the overlapped N combined refraction layers is 60-80%, and N is a natural number greater than 1; the high refractive layer (17) is formed of Nb2O5、TiO2、Si3N4Is made of one or more of SiO, the low refraction layer (16) is made of SiO2The thickness of the high refraction layer (17) and the thickness of the low refraction layer (16) are respectively
10. The manual control structure of claim 9, wherein: the reflection absorption layer (18) is made of one or more of metal chromium, chromium-nickel alloy, silicon-aluminum alloy and indium-tin alloy, and the thickness of the reflection absorption layer (18) is
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921986768.5U CN211335761U (en) | 2019-11-18 | 2019-11-18 | Manual control structure of automobile anti-glare rearview mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921986768.5U CN211335761U (en) | 2019-11-18 | 2019-11-18 | Manual control structure of automobile anti-glare rearview mirror |
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| Publication Number | Publication Date |
|---|---|
| CN211335761U true CN211335761U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921986768.5U Expired - Fee Related CN211335761U (en) | 2019-11-18 | 2019-11-18 | Manual control structure of automobile anti-glare rearview mirror |
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| Country | Link |
|---|---|
| CN (1) | CN211335761U (en) |
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- 2019-11-18 CN CN201921986768.5U patent/CN211335761U/en not_active Expired - Fee Related
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Granted publication date: 20200825 |